You are being downvoted but I think you are correct: I'm not sure I could name a single company that came out from YC in the past 10 years, which makes think that YC was essentially pg, and I'm not a fan of him but he was obviously a very talented business person and had a really good eye for startups.

YC's leadership nowadays seem to lack of any kind of vision and just follows whatever shiny tech is currently in vogue, which is a huge red flag for accelerators.